Related Clues:

• Calendar periods: Abbr.
• Soph. and others
• Calendar spans: Abbr.
• Age: Abbr.
• Cal. units
• Many mos.
• '97 and '98, e.g.
• Jr. and sr.
• Wks. and wks.
• Calendar units: Abbr.
• Age abbr.
• Soph. and jr.
• Mos. and mos.
• 1492 and 2001: Abbr.
• 31-Across divs.